aws-delivlib
Version:
A fabulous library for defining continuous pipelines for building, testing and releasing code libraries.
91 lines (90 loc) • 2.62 kB
JavaScript
import { getMissingHeaders } from "./get-missing-headers";
import { getPayload } from "./get-payload";
async function middleware(webhooks, options, request, response, next) {
let pathname;
try {
pathname = new URL(request.url, "http://localhost").pathname;
} catch (error) {
response.writeHead(422, {
"content-type": "application/json"
});
response.end(
JSON.stringify({
error: `Request URL could not be parsed: ${request.url}`
})
);
return;
}
const isUnknownRoute = request.method !== "POST" || pathname !== options.path;
const isExpressMiddleware = typeof next === "function";
if (isUnknownRoute) {
if (isExpressMiddleware) {
return next();
} else {
return options.onUnhandledRequest(request, response);
}
}
if (!request.headers["content-type"] || !request.headers["content-type"].startsWith("application/json")) {
response.writeHead(415, {
"content-type": "application/json",
accept: "application/json"
});
response.end(
JSON.stringify({
error: `Unsupported "Content-Type" header value. Must be "application/json"`
})
);
return;
}
const missingHeaders = getMissingHeaders(request).join(", ");
if (missingHeaders) {
response.writeHead(400, {
"content-type": "application/json"
});
response.end(
JSON.stringify({
error: `Required headers missing: ${missingHeaders}`
})
);
return;
}
const eventName = request.headers["x-github-event"];
const signatureSHA256 = request.headers["x-hub-signature-256"];
const id = request.headers["x-github-delivery"];
options.log.debug(`${eventName} event received (id: ${id})`);
let didTimeout = false;
const timeout = setTimeout(() => {
didTimeout = true;
response.statusCode = 202;
response.end("still processing\n");
}, 9e3).unref();
try {
const payload = await getPayload(request);
await webhooks.verifyAndReceive({
id,
name: eventName,
payload,
signature: signatureSHA256
});
clearTimeout(timeout);
if (didTimeout)
return;
response.end("ok\n");
} catch (error) {
clearTimeout(timeout);
if (didTimeout)
return;
const err = Array.from(error)[0];
const errorMessage = err.message ? `${err.name}: ${err.message}` : "Error: An Unspecified error occurred";
response.statusCode = typeof err.status !== "undefined" ? err.status : 500;
options.log.error(error);
response.end(
JSON.stringify({
error: errorMessage
})
);
}
}
export {
middleware
};